Oil saver



sept. 4,1928. 1,683,107 C. SEVERNS ET AL OIL SAVER Filed Deo. 28, 192'? Signs?.

Patented Sept. 4, 1928.

UNITED STATES .Legami PATENT oFFlcE.

I CLAYTON SEVERNS AND JOHN-N. HICKS, OF LOS ANGELES, CALIFORNIA.

i OIL SAVER.

Applicationled December 28, 1927. Serial No. 243,076.

This invention relates to oil saving devices such as used at the upper end of well tubing or casing for saving oil when the cable of a bailer or swab is being run out through the mouth of the well. These devices are usually constructed with spring pressed triggers which hold the device on the end of the casing and when these triggers are struck A by the cable-socket, they release themselves and permit the oil saver to detach itself from the casing. One of the difficulties with these devices is that they are not properly packed and usually a considerable amount of oil wiped o'if of the cable runs out of the oil.

saver between the cap and the casing. Furthermore, as usually constructed, the triggers or latches that hold the oil saver on the .casing occupy a considerable amount of space and do not give suflicient clearance for the cable and cable-socket. The general object of'this invention is to provide an oil saver of simple construction in which the triggers are capable of substantially withdrawing into the wall of the plug or body of the oil saver which carries them; also to prov vide improved means for packing the joint between the cap and the sleeve of the oil saver on the end face of the sleeve and in such a way that the triggers will resist the upward pull of the plug when the cap is screwed down onto the sleeve.

. similar to Figure 1, but showing only the Further objects of the invention will appear hereinafter.

The invention consists in the novel parts and combination of parts to be described hereinafter, all of which contribute to produce an `efficient oil saver.

A preferred embodiment of the invention is described in the followingv specification, while the broad scope of the invention is pointed out in the appended claims.

In the drawings:

Figure 1 is a vertical section through an oil saver embodying our invention, portions of the handles of the cap being shown in elevation; in this view the cabile is indicated in dotted lines and the triggers are shownpin their normal position. Figure 2 is a view lower portion of the oil saver; this view shows the triggers withdrawn into their slots in the body of the oil saver.

In practicing the invention, we provide a sleeve 1 the lower end of which is provided i with means such as threads 2 for securing it to the upper end of a well tubing or casing. The interior of this sleeve ismprorided-.-

form having a relatively large bore 5 at its lower end. The wall of this body or plug 4 at its lower end is provided with slots 6. The upper por-tions of these slots are not completely cut through the wall of the plug but the lower ends of the slots are cut through so as to permit the catches 7 of ltriggers 8 to engage the shoulder 3. These triggers are pivotally mounted on cross pins 9 in their corresponding slots. Each trigger is in the form of a straight bar having a tapered tail 10 which normally projects into the bore 5 of the plug 4 so as to lie close to the cable 11 and. `in a position toV be struck by the cable-socket when it arrives at the oil saver.

We provide spring means for holding the triggers normally in the position in which they are shown in Figure 1. This spring means preferably consists of two coil springs 12 each of which is received in a round socket 13 formed in the outer side of the tail of each trigger. The outer ends of these springs thrust against the bottom of the groove 14 which forms the upper end of theslot 6; in other words, the outer ends of these springs thrust against the wall of the plug 4.

The upper portion of the plug 4 has a thread connection with a cap 15 .which seats on the upper end face 16 of the sleeve, being provided with a tubular apron 17 which extends down over the upper portion of the sleeve; a packing ring 18 is clamped b etween a shoulder 19 on the lower end of the cap and the end face 16, said packing ring being received in 'an annular groove 20 formed in the shoulder.

The cap is provided with a plurality of radial arms or handles. 21 which' facilitate its being rota-ted in screwing it onto the thread of the plug.

The upper end of the plug is formed into a stung box 22 having a gland 23 and a cap nut 24 through which the cable eX-' in Figure 2, vshowing that wh'en the cablesocket passes up between the triggers, it

which t ereby ,detaches the oil saver from y the tubi g.

.ing the shoulder as indicated. By

The pins 9 pass transversely through the slots 6 and this enables the'triggersto withdraw into the slots in the manner indicated in Figure v The detaching of the catches .7 from the annular shoulder 3 is facilitated by inclininclining the shoulder it will be evident that-the shoulder does not interfere with the swinging of the catch away from it, but at the same time, the inclination of this shoulder prevents the triggers from disengaging themselves by the upward pull exerted upon the plug when the cap 15 is screwed down onto the upper end of the sleeve.

The triggers 8 are preferably in the form of straight steel bars which are relatively wide so as to enable the sockets 13 to be formed in'them to carry the springs 12. Near the pivots 9, we provide an inclined stop face 26 to act as stops for 'the triggers when the body of the oil saver has been pulled. out of the sleeve.- These stop faces limit the swinging movement of the triggers and prevent the springs 12 from getting out of position in their sockets.

What we claim is 1. In an oil saving' device to cooperate with a cable and socket, the combination of a sleeve having means for attaching the same to the upper end o'f a well tubing or casing, a cap having a bore, seated on the upper end face of the sleeve, a packing rin clamped between the cap and the said en face, a lug threaded to the cap carryin a stuiing ox at its upper end and having s ots in its wall at its lower end, said sleeve hav` ing a circumferential shoulder onits inner face, a trigger pivotally mounted in each slot and having a tail normally projecting into said bore so as to be engaged by the cablev socket, and spring means associated with the triggers fornormally holding the triggers in engagement with the said shoulder, said triggers cooperating with said cap to hold the plug in the sleeve when the cap is screwed down on the packing ring, and operating tov withdraw substantiall into their corresponding slots when their tails are struck by the cable-socket.

2.In an oil saving device to cooperate ,with a cable and socket, the combination of` a sleeve having means for attaching the saine to the upper end of' a well tubing or casing, a cap having a bore, seated on the up er end face of the sleeve, a packing. ring c amped between the cap and the said end face, a

plug threaded tothe cap carrying a stung l mounted in each socket andv thrustin box at its upper end and having -slots in i'ts wall at its lower end, said sleeve having a circumferential shoulder on its inner face,

a trigger pivotally mounted in each slot and having a tail normally projecting into said bore so as to be engaged by the cable-socket, and a spring correspondin to each trigger located between. the tail o the trig er and the wall of the plug for normally oldin .the triggers in engagement with the sai shoulder, said triggers cooperating with saidl at its upper end and having slots in its .wall at its lower end, said sleeve having a circumferential shoulder on its inner face,

a trigger pivotallyl mounted in each slot and having a tail normally'projecting into said bore so as to be engaged by the cablesocket, each tri ger`ha'ving a spring socket on the outer si e of its tail, a coil spring at its outer end against the wall of the p ug for holding the triggers in engagement with the said shoulder, said tri ger cooperating with said4 cap to hold the p ug in the sleeve when the cap is screwed down on the packing-ring.

4. In an oil saving device to cooperate with a cable and socket, ythe combination-of a sleeve having means for attaching the 'saine to the upper end of a well tubing or casing, a cap having a bore, seated on the upper end face of the sleeve, a packing-ring clamped between the cap and the said end face, a plug threaded to the cap carrying a stuiling lox at its u perend and having slots'in its wallat its ower "end, said sleeve having a lcircumferential shoulder on its inner face,

a trigger in the form of a substantially straig and'having a tail lnormally rejecting into said bore so astobe engaged bythe cablesocket, said tri gers being capable of substantially with rawing into said slots when t bar pivotally mounted in each slot their tails are struck, and having spring sockets in the outer sides of their tails, a-

coil spring carried in each socket and thrust'- ing at its outery end against the wall of the plug, and normally holdinor the triggers in engagement withI the sai p 4 shoulder, said triggers cooperatin with said cap to holdv 

